Kakuro Puzzle Book for Adults Kakuro puzzles are number puzzles which are solved in a crossword style grid. The number in each gray square indicates the sum of the numbers in the squares to the right of it or below it, as per the direction of the arrow. The white squares can contain any of the digits from 1-9, however, a digit can be used only once in any vertical column or horizontal line to make the target number. By using logic and patience, all puzzles are solvable without guessing. For your convenience, I have included a reference guide at the back of the book listing the most common number sequences. Puzzle Book Details 120 Kakuro puzzles Solutions included Reference Guide Your Puzzle Book Conveniently sized at 6" x 9" (15.24 cm x 22.86 cm) for easy transporting Printed on bright white paper Professionally bound in a soft matte cover Kakuro is a fun and entertaining way to stimulate your mind! Grab a pencil, sit back and relax. Scroll up and click the Buy Now button to reserve your copy today. Also makes a great gift or stocking stuffer for a puzzle-loving friend!